CN108565123B - distributed solar lighting power supply system for buildings - Google Patents
distributed solar lighting power supply system for buildings Download PDFInfo
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- CN108565123B CN108565123B CN201810284451.0A CN201810284451A CN108565123B CN 108565123 B CN108565123 B CN 108565123B CN 201810284451 A CN201810284451 A CN 201810284451A CN 108565123 B CN108565123 B CN 108565123B
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2022—Light-sensitive devices characterized by he counter electrode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
- F21V23/023—Power supplies in a casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2027—Light-sensitive devices comprising an oxide semiconductor electrode
- H01G9/2031—Light-sensitive devices comprising an oxide semiconductor electrode comprising titanium oxide, e.g. TiO2
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/542—Dye sensitized solar cells
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Hybrid Cells (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a distributed solar lighting power supply system for a building, which comprises a solar battery pack, a solar charging and discharging controller, a storage battery pack, an inverter and a building lighting system distribution box, wherein the solar battery pack is a dye-sensitized solar battery and comprises a photo-anode, a counter electrode and electrolyte, the photo-anode and the counter electrode are oppositely arranged, liquid electrolyte is clamped between the photo-anode and the counter electrode, the photo-anode comprises an FTO (fluorine doped tin oxide) substrate, a TiO 2 composite film is arranged on the surface of the FTO substrate, and the counter electrode comprises a Ti metal sheet and a Ti/TiO 2 nanotube film arranged on the surface of the Ti metal sheet.
Description
Technical Field
The invention relates to the technical field of building lighting systems, in particular to a distributed solar lighting power supply system for a building.
Background
Solar energy is used as green energy, and the power generation and energy storage technology is mature. By utilizing the solar power generation technology and combining the existing power distribution technology, the better cost and efficiency combination can be achieved by considering the construction cost and the final construction convenience of the solar lighting technology and the supplement power supply for the residential building lighting system. By utilizing solar energy, the purposes of reducing electric energy consumption, reducing carbon and reducing emission can be realized.
Disclosure of Invention
The present invention aims to provide a distributed solar lighting power supply system for buildings to solve the above-mentioned problems.
the embodiment of the invention provides a distributed solar lighting power supply system for a building, which comprises a solar battery pack, a solar charging and discharging controller, a storage battery pack, an inverter and a building lighting system distribution box, wherein the solar battery pack is arranged on the outer wall surface of the building directly irradiated by sunlight and is connected with the indoor solar charging and discharging controller through a building reserved pipeline, the solar charging and discharging controller respectively provided with storage logic and discharge logic is respectively connected with a distribution box lighting loop through a building reserved pipeline, the solar charging and discharging controller is also connected with the storage battery pack and the inverter through the building reserved pipeline, the inverter is connected with the distribution box lighting loop through the building reserved pipeline, the solar battery pack is a dye-sensitized solar battery and comprises a photo-anode, a counter electrode and electrolyte, the photo-anode and the counter electrode are oppositely arranged, the liquid electrolyte is sandwiched in the middle, the photo-anode comprises an FTO substrate, a TiO 2 composite film is arranged on the surface of the FTO substrate, and the counter electrode comprises a Ti metal sheet and a Ti/TiO 2 nanotube film arranged on the surface of the Ti metal sheet.
the technical scheme provided by the embodiment of the invention can have the following beneficial effects:
The invention can realize the function of supplying power for the residential lighting system, and realizes the effects of reducing the electric energy consumption, low carbon and emission reduction by utilizing the solar energy.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic view of the mounting structure of the present invention.
Fig. 2 is a logic diagram of the charge and discharge controller system according to the present invention.
Fig. 3 is a power storage logic diagram of the charge and discharge controller according to the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
With reference to fig. 1, an embodiment of the present invention relates to a distributed solar lighting power supply system for a building, which includes a solar battery pack 1, a solar charging and discharging controller 2, a storage battery pack 3, an inverter 4, and a distribution box 5 of a building lighting system; the solar battery 1 is a battery assembly formed by connecting single solar cells in series and in parallel. The main function of the solar charge-discharge controller is to provide logic control for the whole system. The inverter mainly functions to invert direct current into alternating current. The storage battery (set) has the main function of providing electric energy storage for the system. The solar battery pack is arranged on the outer wall surface of a building directly irradiated by sunlight, is connected with an indoor solar charging and discharging controller through a building reserved pipeline, and is connected with the solar charging and discharging controller respectively provided with an electric power storage logic and a discharging logic through the building reserved pipeline in a distribution box main switch loop and a distribution box illumination loop respectively; the solar charging and discharging controller is connected with the storage battery pack and the inverter through a building reserved pipeline; and the inverter is connected with the switch of the lighting loop of the distribution box through a pipeline reserved in the building.
the working principle of the invention is shown in figures 2 and 3.
The charge and discharge control logic of the solar charge and discharge controller is divided into an electric power storage logic and a discharge logic.
the charge and discharge controller has the following power storage logic:
1. The solar battery pack (solar panel) generates electric energy and transmits the electric energy to the charge and discharge controller.
2. The controller comprehensively judges the charging and discharging conditions according to the voltage of the storage battery (pack).
3. And charging the battery (pack) when the voltage of the battery (pack) is lower than the highest voltage.
4. The charging of the battery (pack) is stopped when the battery (pack) voltage is higher than the highest voltage.
The discharge logic of the charge and discharge controller is as follows:
1. When the voltage of the storage battery (battery pack) is lower than the lowest discharge voltage, the charge-discharge controller is communicated with the switch power supply of the main switch of the distribution box and the lighting loop of the distribution box, the commercial power is directly output to the lighting loop of the distribution box, and the commercial power directly supplies power to the lighting system.
2. When the voltage of the storage battery (group) is higher than the lowest discharge voltage, the main switch of the distribution box is disconnected with the lighting switch of the distribution box, the storage battery (group) loop is controlled to be communicated with the inverter loop, and the inverter outputs electric energy to the lighting distribution box switch to supply power for the lighting system.
In a preferred embodiment, the solar cell 1 is a dye-sensitized solar cell. At present, the silicon-based solar cell industry as the first generation solar cell has already occupied 90% of the market of the photovoltaic industry, the photoelectric conversion efficiency of the monocrystalline silicon solar cell is very high, but the wide application of the monocrystalline silicon solar cell is limited due to the environmental pollution caused by the shortage of silicon materials and the complex manufacturing process; the second generation solar cell is a compound solar cell based on thin film technology, such as amorphous silicon, CdTe, CIGS and the like, and has the defects of high toxicity, temperature dependence, material shortage and the like; in the third generation solar cell, the advantages of the dye-sensitized solar cell are very prominent, and the dye-sensitized solar cell becomes a research direction of the solar cell with low cost and high efficiency.
The dye-sensitized solar cell generally comprises a light anode, a counter electrode and electrolyte to form an organic-inorganic composite photoelectrochemical solar cell with a sandwich structure; the improvement on the materials and the structure of the photo-anode and the counter electrode can effectively improve the photoelectric conversion efficiency of the cell.
based on the above, the technical scheme of the invention discloses a dye-sensitized solar cell based on the traditional dye-sensitized solar cell, which comprises a photo-anode, a counter electrode and electrolyte, wherein the photo-anode and the counter electrode are oppositely arranged and the liquid electrolyte is sandwiched between the photo-anode and the counter electrode.
Regarding the photo-anode, the technical scheme of the application improves the photo-anode, and the photo-anode comprises an FTO substrate, wherein a TiO 2 composite film is arranged on the surface of the FTO substrate;
Specifically, the TiO 2 composite film comprises a BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure and TiO 2 nanoparticles, and the TiO 2 composite film is formed by screen printing TiO 2 composite slurry on the surface of an FTO substrate so as to form the TiO 2 composite film.
the titanium dioxide is a direct band gap semiconductor transition metal oxide, and is widely used in the traditional fields such as pigments, photoelectrochemistry, sensors and the like, at the present stage, because TiO 2 has better physical and chemical stability and strong acid and alkali corrosion resistance, and the nanometer-sized TiO 2 shows excellent performances in the aspects of charge transfer separation, dye adsorption and the like, titanium dioxide slurry is always used as a main substance in the photoanode of the dye-sensitized solar cell, and in the technical scheme of the invention, a BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure and TiO 2 nanoparticles are creatively mixed to be used as the photoanode, so that the photoanode has a channel beneficial to electron transfer, is beneficial to dye adsorption, reduces electron annihilation, and achieves unexpected beneficial effects.
Preferably, the mass ratio of the BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure to the TiO 2 nanoparticle is 5: 3.
Preferably, the particle size of the TiO 2 nanoparticles is 40 nm.
Preferably, in the BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure, the TiO 2 is a nanosheet, both the BaTiO 3 and the MoS 2 are nanoparticles, the side length of the TiO 2 nanosheet is 120nm, the BaTiO 3 nanoparticle is 20nm, and the MoS 2 nanoparticle is 100 nm.
Further preferably, in the BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure, the molar ratio of BaTiO 3, MoS 2 and TiO 2 is 1:1: 4.
Under the above molar mass control, BaTiO 3, MoS 2, and TiO 2 are combined to exhibit an optimum technical effect, thereby improving electron transport efficiency and reducing electron annihilation.
In the prior art, the technical scheme that a BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure is applied to a photo-anode is not multiple, in the technical scheme of the invention, BaTiO 3, MoS 2 and TiO 2 are creatively combined, so that the transmission efficiency of electrons can be improved, and the scattering capability of the photo-anode is improved, so that the photoelectric conversion efficiency is improved, and an unexpected technical effect is achieved.
preferably, the thickness of the TiO 2 composite film is 20 μm.
Regarding a counter electrode, the technical scheme of the application improves the counter electrode, the counter electrode comprises a Ti metal sheet and a Ti/TiO 2 nanotube film arranged on the surface of the Ti metal sheet, the thickness of the Ti metal sheet is 0.2mm, the purity is more than or equal to 99.7%, and the Ti/TiO 2 nanotube film on the surface of the Ti metal sheet is formed by the steps of firstly preparing a titanium dioxide nanotube array by using an anodic oxidation metal titanium sheet, and then doping the titanium dioxide nanotube array by adopting magnetron sputtering Ti to form the Ti/TiO 2 nanotube film.
The thickness of the Ti/TiO 2 nanotube film is 1 μm;
The wall thickness of the Ti/TiO 2 nano tube is 50nm, and the diameter of the nano tube is 100 nm;
In the technical scheme of the invention, the Ti/TiO 2 nanotube film is used for replacing a platinum modification layer, so that the titanium/TiO 2 nanotube film has good conductivity, stable chemical property and high catalytic activity, achieves positive technical effects, and provides a good substitute material for the platinum counter electrode.
the present invention will be described in detail by way of examples. It is also to be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the invention, and that certain insubstantial modifications and adaptations of the invention by those skilled in the art may be made in light of the above teachings. The specific process parameters and the like of the following examples are also only one example of suitable ranges, i.e., those skilled in the art can select the appropriate ranges through the description herein, and are not limited to the specific values exemplified below.
example 1
In this embodiment, the dye-sensitized solar cell includes a photo-anode, a counter electrode, and an electrolyte, in which the photo-anode and the counter electrode are disposed opposite to each other with a liquid electrolyte interposed therebetween.
the photoanode comprises an FTO substrate, wherein a TiO 2 composite film is arranged on the surface of the FTO substrate, the TiO 2 composite film comprises a BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure and TiO 2 nanoparticles, and the TiO 2 composite film is formed by screen printing TiO 2 composite slurry on the surface of the FTO substrate so as to form the TiO 2 composite film.
Specifically, in a BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure, TiO 2 is a nanosheet, BaTiO 3 and MoS 2 are nanoparticles, the molar ratio of BaTiO 3 to MoS 2 to TiO 2 is 1:1:4, the side length of the TiO 2 nanosheet is 120nm, the particle size of BaTiO 3 nanoparticles is 20nm, and the particle size of MoS 2 nanoparticles is 100 nm;
The particle size of the TiO 2 nano-particles is 40 nm;
The mass ratio of the BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure to the TiO 2 nanoparticle is 5: 3.
The thickness of the TiO 2 composite film was 20 μm.
The counter electrode comprises a Ti metal sheet and a Ti/TiO 2 nanotube film arranged on the surface of the Ti metal sheet, wherein the thickness of the Ti metal sheet is 0.2mm, the purity of the Ti metal sheet is more than or equal to 99.7%, and the Ti/TiO 2 nanotube film on the surface of the Ti metal sheet is formed by preparing a titanium dioxide nanotube array by anodizing the metal titanium sheet, and then doping the titanium dioxide nanotube array by magnetron sputtering Ti to form the Ti/TiO 2 nanotube film.
specifically, the thickness of the Ti/TiO 2 nanotube film is 1 μm;
The wall thickness of the Ti/TiO 2 nano tube is 50nm, and the diameter of the nano tube is 100 nm.
the preparation steps of the dye-sensitized solar cell are as follows:
Step 1, preparing a photo-anode
a) Preparation of TiO 2 nanosheet
Preparing a TiO 2 nano sheet by a hydrothermal method, namely taking 10ml of tetrabutyl titanate at room temperature, putting the tetrabutyl titanate into a 50ml of polytetrafluoroethylene reaction kettle, adding 1.4ml of 49 wt.% hydrofluoric acid solution under stirring, preserving heat at 200 ℃ for 24h to obtain white precipitate, and then sequentially carrying out centrifugal cleaning on the white precipitate by ultrapure water and ethanol to obtain a product, and drying the product at 70 ℃ for 24h to obtain the TiO 2 nano sheet;
b) Preparation of MoS 2
Respectively dissolving 0.3g of sodium molybdate, 0.4g of thioacetamide and 0.5g of oxalic acid in 20ml of deionized water, and magnetically stirring for 15min to respectively form uniform solutions;
Then, slowly pouring 20ml of thioacetamide solution into 20ml of sodium molybdate solution, simultaneously carrying out magnetic stirring for 10min to form mixed solution A, then mixing 20ml of oxalic acid solution with the mixed solution A, and carrying out ultrasonic treatment for 20min to enable the solution to fully react to form mixed solution B;
Transferring the mixed solution B into a 100ml high-pressure reaction kettle, sealing the reaction kettle completely, putting the reaction kettle into the high-pressure reaction kettle, keeping the temperature at 200 ℃ for 30 hours, centrifugally collecting precipitates generated in the reaction kettle after the reaction is finished, cleaning the precipitates, drying the precipitates in a vacuum drying oven at 60 ℃ for 10 hours, and annealing the precipitates for 75 minutes at 630 ℃ under the protection of argon to obtain MoS 2;
c) Preparation of BaTiO 3/MoS 2/TiO 2
completely dissolving barium hydroxide in ultrapure water to prepare a solution with the concentration of 14mM and 60ml, adding the solution into a reaction kettle, adding the obtained TiO 2 nanosheets and MoS 2 into the reaction kettle according to the molar ratio, magnetically stirring for 50min, then preserving the temperature at 210 ℃ for 35h, naturally cooling to room temperature after the reaction is finished, washing the obtained product with 0.1M hydrochloric acid solution and deionized water for multiple times, and then drying to obtain the BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure;
d) Preparation of photo-anode
Firstly, preparing a BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure and TiO 2 nanoparticles into TiO 2 composite slurry, wherein a photoanode substrate is an FTO substrate, cutting and cleaning the FTO substrate, preparing 0.04M TiCl 4 aqueous solution, putting the cleaned FTO substrate into the TiCl 4 aqueous solution, keeping the temperature of the FTO substrate at 80 ℃ for 1 hour, taking out the FTO substrate, repeatedly washing the FTO substrate with deionized water, putting the FTO substrate into a muffle furnace, and annealing the FTO substrate at 400 ℃ for 1 hour;
Coating TiO 2 composite slurry on a treated FTO substrate by adopting a screen printing method, drying the FTO substrate coated with the slurry at 260 ℃ for 5 hours after reaching the required thickness, then calcining at 290 ℃ for 40 minutes, calcining at 310 ℃ for 15 minutes, calcining at 360 ℃ for 50 minutes, calcining at 450 ℃ for 30 minutes, and calcining at 500 ℃ for 20 minutes, immersing the calcined FTO substrate into a mixed solution of acetonitrile and tert-butyl alcohol of 0.05mM dye N-719, wherein the volume ratio of the acetonitrile to the tert-butyl alcohol is 1:1, standing for 24 hours, taking out and airing to obtain the photo-anode;
Step 2, preparing a counter electrode
The method comprises the following steps of taking a platinum-modified graphite electrode as a cathode, taking a Ti metal sheet as an anode, applying a voltage of 60V, and carrying out anodic oxidation at room temperature for 12h in an ethylene glycol solution with the mass percent of ammonium fluoride of 0.1% to obtain a TiO 2 nanotube array attached to the Ti metal sheet, putting the Ti metal sheet attached with the TiO 2 nanotube array into a magnetron sputtering instrument for carrying out magnetron sputtering on Ti, wherein the background vacuum is 5Pa, the argon gas rate is 22sccm, the magnetron sputtering power is 360W, the magnetron sputtering voltage is 230V, and the magnetron sputtering time is 25s to obtain the Ti/TiO 2 nanotube film, and then obtaining the counter electrode;
Step 3, packaging
the photoanode and the counter electrode are arranged oppositely, electrolyte is injected between the two electrodes to jointly form a cell with a sandwich structure, and the two electrodes are packaged to obtain the dye-sensitized solar cell; wherein, the electrolyte is iodine/iodine triple negative ion electrolyte, 100ml of acetonitrile solution is firstly weighed, 0.1M of lithium iodide, 0.1M of elementary iodine, 0.6M of 4-tert-butylpyridine and 0.6M of tetrabutylammonium iodide are added into the acetonitrile solution, and light shielding and ultrasonic treatment are carried out for 5min to ensure that the acetonitrile solution is fully dissolved; then, 5g of Ag nanoparticles were weighed, added to the mixed solution, and mixed well.
The photoelectric performance of the dye-sensitized solar cell is mainly represented by measuring the short-circuit current density-open-circuit voltage of the cell, the test is carried out under the irradiation of simulated standard sunlight, and the performance of the obtained dye-sensitized solar cell is tested under the standard light source of AM 1.5. through the measurement, the open-circuit voltage of the dye-sensitized solar cell obtained in the embodiment is 0.79V, the short-circuit current density is 19.56mA/cm 2, and the photoelectric conversion efficiency is as high as 12.1%;
in the embodiment, the TiO 2 composite film includes a BaTiO 3/MoS 2/TiO 2 nanosheet heterostructure, the counter electrode includes a Ti/TiO 2 nanotube film, and the BaTiO 3, MoS 2, TiO 2, and Ti/TiO 2 nanotubes are combined to exert the optimal technical effect, so that the electron transmission efficiency is improved, the electron annihilation is reduced, and the photoelectric conversion efficiency is further improved.
Example 2
in this embodiment, the dye-sensitized solar cell includes a photo-anode, a counter electrode, and an electrolyte, in which the photo-anode and the counter electrode are disposed opposite to each other with a liquid electrolyte interposed therebetween.
The photoanode comprises an FTO substrate, wherein a TiO 2 composite film is arranged on the surface of the FTO substrate, the TiO 2 composite film comprises a BaTiO 3/TiO 2 nanosheet heterostructure and TiO 2 nanoparticles, and the TiO 2 composite film is formed by screen printing TiO 2 composite slurry on the surface of the FTO substrate so as to form the TiO 2 composite film.
Specifically, in a BaTiO 3/TiO 2 nanosheet heterostructure, TiO 2 is a nanosheet, BaTiO 3 is a nanoparticle, the molar ratio of BaTiO 3 to TiO 2 is 1:4, the side length of the TiO 2 nanosheet is 120nm, and the particle size of the BaTiO 3 nanoparticle is 20 nm;
The particle size of the TiO 2 nano-particles is 40 nm;
the mass ratio of the BaTiO 3/TiO 2 nanosheet heterostructure to the TiO 2 nanoparticle is 5: 3.
The thickness of the TiO 2 composite film was 20 μm.
The counter electrode comprises a Ti metal sheet and a Ti/TiO 2 nanotube film arranged on the surface of the Ti metal sheet, wherein the thickness of the Ti metal sheet is 0.2mm, the purity of the Ti metal sheet is more than or equal to 99.7%, and the Ti/TiO 2 nanotube film on the surface of the Ti metal sheet is formed by preparing a titanium dioxide nanotube array by anodizing the metal titanium sheet, and then doping the titanium dioxide nanotube array by magnetron sputtering Ti to form the Ti/TiO 2 nanotube film.
specifically, the thickness of the Ti/TiO 2 nanotube film is 1 μm;
The wall thickness of the Ti/TiO 2 nano tube is 50nm, and the diameter of the nano tube is 100 nm.
The photoelectric performance of the dye-sensitized solar cell is mainly represented by measuring the short-circuit current density-open-circuit voltage of the cell, the test is carried out under the irradiation of simulated standard sunlight, and the performance of the obtained dye-sensitized solar cell is tested under the standard light source of AM 1.5. through the measurement, the open-circuit voltage of the dye-sensitized solar cell obtained in the embodiment is 0.71V, the short-circuit current density is 17.88mA/cm 2, and the photoelectric conversion efficiency is as high as 9.4%;
In this example, compared to example 1, the TiO 2 composite film includes a BaTiO 3/TiO 2 nanosheet heterostructure, and the counter electrode includes a Ti/TiO 2 nanotube film, so that the photoelectric conversion efficiency is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the invention are therefore intended to be embraced therein.
Claims (6)
1. A distributed solar lighting power supply system for a building is characterized by comprising a solar battery pack, a solar charging and discharging controller, a storage battery pack, an inverter and a building lighting system distribution box; the solar battery pack is arranged on the outer wall surface of a building directly irradiated by sunlight, is connected with an indoor solar charging and discharging controller through a building reserved pipeline, and is connected with the solar charging and discharging controller respectively provided with an electric power storage logic and a discharging logic through the building reserved pipeline in a distribution box main switch loop and a distribution box illumination loop respectively; the solar charging and discharging controller is connected with the storage battery pack and the inverter through a building reserved pipeline; connecting the inverter with a switch of a lighting loop of the distribution box through a reserved pipeline of a building; the solar battery pack is a dye-sensitized solar battery and comprises a photo-anode, a counter electrode and electrolyte, wherein the photo-anode and the counter electrode are oppositely arranged, and liquid electrolyte is sandwiched between the photo-anode and the counter electrode; the photoanode comprises an FTO substrate, wherein a TiO2 composite film is arranged on the surface of the FTO substrate; the counter electrode comprises a Ti metal sheet and a Ti/TiO2 nanotube film arranged on the surface of the Ti metal sheet;
The TiO2 composite film comprises a BaTiO3/MoS2/TiO2 nanosheet heterostructure and TiO2 nanoparticles; the mass ratio of the BaTiO3/MoS2/TiO2 nanosheet heterostructure to the TiO2 nanoparticle is 5: 3; the TiO2 composite film is formed by: the TiO2 composite film is formed by screen printing TiO2 composite slurry on the surface of an FTO substrate.
2. The distributed solar lighting power supply system according to claim 1, wherein in the BaTiO3/MoS2/TiO2 nanosheet heterostructure, the TiO2 is nanosheet, and both BaTiO3 and MoS2 are nanoparticles; the molar ratio of BaTiO3 to MoS2 to TiO2 is 1:1: 4.
3. The distributed solar lighting power supply system according to claim 2, wherein the TiO2 nanosheets have a side length of 120nm, the BaTiO3 nanoparticles have a particle size of 20nm, and the MoS2 nanoparticles have a particle size of 100 nm; the particle size of the TiO2 nano-particles is 40 nm.
4. The distributed solar lighting power supply system as claimed in claim 1 wherein the TiO2 composite film has a thickness of 20 μm.
5. The distributed solar lighting power supply system as claimed in claim 1, wherein the Ti/TiO2 nanotube film has a thickness of 1 μm; the wall thickness of the Ti/TiO2 nano tube is 50nm, and the diameter of the nano tube is 100 nm.
6. The distributed solar lighting power supply system according to claim 1, wherein the dye-sensitized solar cell is prepared by:
step 1, preparing a photo-anode
a) preparation of TiO2 nanosheet
b) preparation of MoS2
Respectively dissolving 0.3g of sodium molybdate, 0.4g of thioacetamide and 0.5g of oxalic acid in 20ml of deionized water, and magnetically stirring for 15min to respectively form uniform solutions;
Then, slowly pouring 20ml of thioacetamide solution into 20ml of sodium molybdate solution, simultaneously carrying out magnetic stirring for 10min to form mixed solution A, then mixing 20ml of oxalic acid solution with the mixed solution A, and carrying out ultrasonic treatment for 20min to enable the solution to fully react to form mixed solution B;
Transferring the mixed solution B into a 100ml high-pressure reaction kettle, sealing the reaction kettle completely, and putting the reaction kettle at the temperature of 200 ℃ for heat preservation for 30 hours; after the reaction is finished, centrifugally collecting precipitates generated in the reaction kettle, cleaning, drying the precipitates in a vacuum drying oven at 60 ℃ for 10 hours, and then annealing at 630 ℃ for 75min under the protection of argon to obtain MoS 2;
c) Preparation of BaTiO3/MoS2/TiO2
completely dissolving barium hydroxide in ultrapure water to prepare a solution with the concentration of 14mM and 60ml, adding the solution into a reaction kettle, adding the obtained TiO2 nanosheets and MoS2 into the reaction kettle according to the molar ratio, magnetically stirring for 50min, then preserving the temperature at 210 ℃ for 35h, naturally cooling to room temperature after the reaction is finished, washing the obtained product with 0.1M hydrochloric acid solution and deionized water for multiple times, and then drying to obtain the BaTiO3/MoS2/TiO2 nanosheet heterostructure;
d) preparing a photo-anode;
Step 2, preparing a counter electrode
Taking a graphite electrode modified by platinum as a cathode, taking a Ti metal sheet as an anode, applying a voltage of 60V, and carrying out anodic oxidation at room temperature for 12h in an ethylene glycol solution with the mass percent of ammonium fluoride of 0.1% to obtain a TiO2 nanotube array attached to the Ti metal sheet; putting the Ti metal sheet attached with the TiO2 nanotube array into a magnetron sputtering instrument, and carrying out magnetron sputtering on Ti; wherein the background vacuum is 5Pa, the argon gas rate is 22sccm, the magnetron sputtering power is 360W, the magnetron sputtering voltage is 230V, and the magnetron sputtering time is 25 s; obtaining the Ti/TiO2 nanotube film to obtain the counter electrode;
step 3, packaging
the photoanode and the counter electrode are arranged oppositely, electrolyte is injected between the two electrodes to jointly form a cell with a sandwich structure, and the two electrodes are packaged to obtain the dye-sensitized solar cell; wherein, the electrolyte is iodine/iodine triple negative ion electrolyte, 100ml of acetonitrile solution is firstly weighed, 0.1M of lithium iodide, 0.1M of elementary iodine, 0.6M 4-tert-butylpyridine and 0.6M of tetrabutylammonium iodide are added into the acetonitrile solution, and the mixture is protected from light and is subjected to ultrasonic treatment for 5min to be fully dissolved; then, 5g of Ag nanoparticles were weighed, added to the mixed solution, and mixed well.
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| CN203912288U (en) * | 2014-06-26 | 2014-10-29 | 中建一局集团第三建筑有限公司 | Distributed building solar lighting power supply system |
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| CN101842934A (en) * | 2007-11-02 | 2010-09-22 | 日本化药株式会社 | Dye-sensitized solar cell module |
| CN203912288U (en) * | 2014-06-26 | 2014-10-29 | 中建一局集团第三建筑有限公司 | Distributed building solar lighting power supply system |
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